Chen Qun

Chen Qun (?-236) was a minister of Wei. On his death bed, Cao Cao entrusted him, Cao Gong, Cao Zhen, and Sima Yi with his affairs. Following the death of Cao Pi, he became guardian of the military and advised Cao Rui along with Sima Hui and Cao Zhen. He established the Nine Class System for civil service nomination.